- What organisms are the most likely pathogens to grow in food that is solute-loaded or has low water activity?
- Cholera can be transmitted by food or water (true or false)
- Flour and sugar are classified as ________ foods.
- At approximately what temperature are most household freezers kept? (celcius)
- The rate of contaminant microbial growth during the exponential phase in food depends on
- When solute is added to food products, the water activity (aw)
- Pickling is a type of food preservation utilizing
- Clostridium botulinum is a gram-________ rod that produces an ________.
- Which organisms are NOT involved in food fermentations?
- Coliforms in a water sample indicate ________ contamination.
- BOTH physical and chemical methods are used to treat and purify water. (true or false)
- Which of the following is NOT characteristic of a coliform? gram-negativefacultatively aerobicrod shapedresistant to chlorination
- What is the conjugate base of H2SO4a. HSO4-b. SO42-c. SO4d.HSO4
- Which is the formula of an amphoteric substance?a. So32-b. HCO3-c. NH4+d. HCI
- In the reaction:H3AsO4(aq)+3Na OH(aq)-->NaAsO4(aq)+3H2O(l) ,how many H= ions dose the bronsted acid losea.2b.1c.4d.3
- Which of the following is/are true about HCO-3?a. HCO-3+H+---->H2CO(aq)b. HCO-3(aq)-->H=(aq)+ CO3/2-(aq)c. HCO-3 species are said be amphoteric since they posses both acids and basic properties d.All of the above
- Finish the acid bases reaction below by writing the formulas of the two products.H2CO3(aq)+F-(aq)<=>a. HCO3-+HFb.HCO3+HF-c.CO3+HF-d.CO3/2-+H2F+
- A substance which can act as both an acid and in different reactions is said to be__________.a. diprotic b. Bipolar c. amphotericd. catalytic
- The ammonium ion serves as an acid in chemical reactions because it donates a BLANK.
- 2H2O<=>H3O+ +OH-Chose the conjugate acid-base pair from the above equation2 answersa. A-IH3O+b. H2OIH3O+c. H2OIHAd. OH-IH2O